Excavator.



N0,;a5 ,756. PATENTED APR. 2s, 1908.

f o. o. JACOBS.

BXGAVATOR.

APPLIUATION FILED FEB. 2a, 1907.

1 PATBNTED- APR. 2s, 1908.

Ic. c. JACOBS.

n EXoAvAroR.

APPLIUTION FILED PEB. 2B, 1907.

3 SHEETS-SHEET 3.

lhaveinvented certain new and useful Curran srnfrns CHARLES C. JACOBS, oF CHICAGO, ILLINOIS, Assrenon rro F. C. AUSTIN DRAINAGE EXoAva PATENT cubren.

TOR COMPANY, F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.l

EXCAVATOR.

specification bf Letters Patent; Patented .april/@ficos Application mea `natrmiry 2a, 1907. serial no. 359,795.

To all whom it mog/concern:

Be it known that I, CHAnL-ns C. JACOBS, residing'at Chicago, Cook county, Illinpis,

mrovements in Excavators, of which the folowing is a specification.

My invention concerns excavators and relates particularly to the bucket of shovel and means for dumping and righting .the same. e

In the preferred embodiment of my invention the bucket having a sharp cutting edge is plivotally mounted on a truck equipped- Witrollers adapted to'4 travel on4 tracks shaped to conform substantially to the cross-sectional roile or outline of the4 proposed trench. he bucket is provided. with a bail, the ends of which are pivoted to crank arms connected to the bucket on either side.

` throughout.

The advancing or forwardly pulling cable is fastened to the bail and holdsthe bucket'in' load-retainin position, and when rollers on the bail str1 e rfixed abutments or stops further advance of .the bucket causes -its turning in its bearings to discharge the load.

On the accompanying drawings a desirable embodiment of my invention has been illustrated and on the various views like reference characters refer to the same parts Figure 1 is a side elevation of the improved form of bucket, showing its cooperation with one of the tracks; Fig. 2 is a view similar to Fig. 1, the-bucket being in load-discharging position; Fig. 3 is a lanview of the bucket or shovel, and in a dition shows fragments Of the tracks of the main frame; Fig. 4 is a section on line 4-4 of Fig. 1, as viewed in the direction indicated by the arrows; Fig. 5 is a cross-section on enlargedscale, showing the details oli/the pivotal mounting at .one side of the bucket; and Fig. 6 is a view on a reduced scale of the complete excavator. Referring to Fig. 6 it will be observed that the main supporting frame, 10, of the ma'- chine is equi ped with rollers, 11, adapted to travel on rai s, 12, laid alongsidc'the opposite edges of the trench. vVertically ladjustable in this main supporting frame isthe ditch or Atrench frame, 13, comprising a pair of sub- 15, and a similar upper ba1, 16. `A lattice work, 17., secured to angls, 18, fastened ,to the two plates, 14, h d the vplates together and space them apa t Adapted to travel on these U-shaped tracks is abucket truck composed of thechannel spaced a art at their front and back ends bg means o two channel bars, 20. This truc 1s equipped .with forwardand rear axles, 21

ings or boxes and provided at their opposite substantially the. same diameter as the distance between the parallel inwardly projeoting flanges of angle -bars 15 and 16. v

Across the rear end of the truck extends a bar, 24, to the center of'which, at 25, is attachedone end of retracti osed just inside of charme 19 is a pair of ongitudinal side plate members', 27, reduced in depth at their rear ends at 28, as shown in `rear axle, 22, upon which they may turn. At its forward end each member, 27, isbent overadapted under normal conditions to rest upon thetop liange ofthe corresponding top chaning of member, f1.27. A downwardly extended plate or bucket support, 30, 1s riveted to the inner face of each o the members, 27, and at accommodate one of the trunnions or short shafts of the bucket. v32, is o en at its top and `front end, and the lower er" e, 33, of its forward mouth is sharp so as tol e able `to Shave ed a layer of dirt as the bucket is pulled alon on its ing and supporting tracks. T e bottom and rear wails, 34 and 35, of the shovel are conrplctely closed in order to retain the dirt scraped off. On .each side of the bucket l provide a short shaft, 36, which is keyed at 37, to the side of the bucket and keyed at its outer end, to a bracket, 38, riveted at 39, to the side of the bucket, and keyed also to a comparatively shortA crank arm, .40. The center portion, 41, of theshaft, 36,.is cylindrical,- iits in and is adapted toturn in the opening, 31, at the lower end of the corre- ,s ending supporting plate, 30. From this (liescription and illustration it will be apparent that by turning either one of the "crank arms on opp` site sides of the bucket the whole bucket may eswung or turned irrite bearings and 22, rotatably vmounted in suitable bear-f' its lower end is circularly apertured, at 31', to

the proper amount.

ends with iianged wheelsv or rollers, 23, of

Figs. 1 and 2, and apertured to receive the Outwardlyto provide the ear or flange., 29, o

nel, 19, thereby limiting the downward turn- The bucket or shovel, 'I l l guide l i .side beams o r bars, 19, tied together and' lclearly il ustrate pair of to discharge its'loed. v`An upwardly extended ar1n,42, is pivotelly connected at 43 with the free end of each of the crank arms, 40, and the top ends oi' these arms are apertured to forni bearings for a cross shaft, 44, the two op osite .ends of which are suplplied with roi. ers, 45, adapted to travel on t e top surfaces of ongle bars,16. To each of these arms, 42, at the point, 46,- near the middle of the arm, l pivot a bent bar, 47, to the forvvfrrd ends of which is'festened a forwardly` pulling or advancing cable, 48. Across the rear upper edge of the bucket l provide an angle or similar ber, 49, of sufiicient length to overla the to i edges of members 27, as is il in fFig. 3. At the rear of the bucket there is provided a shaft or rod, 50, u .on which is rotatably mounted a hook, 51, t e hookedportio'n or head of which is .adapted to overhe the rvangle bar, 49,- in order to revent the sharpcutting edge of the' buc et sinking too deeplyinto the ground and discharging the contents of the shovel, fr convenient means of retaining the hook, 51

.- in place is a pair of collars, 52, on either side of the hook and {ixed to the shaft or rod, 50. At prope'rfpointson the tracks, 14, I bolt a los or fingers, 53, to the flanges of ongle bai's31-, for yfthe purpose of limiting the iorrwerd. travel of roilers, 45, and arms, 42'.

it is to be understood that a suitable engine and boiler is mounted ori the main frame, 10,and is adapted towdraw in and payout cables 4S andy 26, to. cause the reci procetion of the truck end bucket onflthe tracks. The

details oi' this part/'ot the 'inachine have not been illustrated Isince, they ere well understood in this art 'end in ey be of `eny convenient type orform.

W hen the truck 'sind bucket or shovel are descending on the right; hand portion of the tracks, 14, as viewed,l in Fig. 6, and also while thev truck end shovell'ere' traversing the central horizontal 'oortions of the tracks, hook, 51, because of the action of gravity, engages angle bers, 49, and holds the bucket in the position. indicated in Fig. '1Q During the u ward travel oi the truck end bucket on t e left hand' portion of the tracks, this hook dro s away from the bar, 49, permitting the bucket to be turned in its'bearin'gs as soon es the rollers, 4'5,"strike4 thestops, 53. As long' however,A as the cable, 48, is pulling the combined truck end bucket' forwardly and before the rollershave reached the stops, the bucket is maintained in load-reteining osition since the forward pull on arrnsor lliars, 47, tends through the crank arm, 32, to keep the bucket righted. Under these conditions down-.verdswinging oi orcos, 42 end the'sheft, 44, which together,` in eilect, constitute e bail, is preventedby the rollers, 45, riding or treveling on the top surfeces of engle bers, 1G. Wlrienthe rol ersv meet the Jsto' s, 53,

f further travel ot the seine in a'iorwar direcseance As will be understood, a winding up of' cable 26 on its druni on the main frame o J thc machine causes a backward or rearward travel of the truck und bucket on the tracks,

which are so shaped as to produce a trench of the desired cross section. By maintaining a sliffht pulling action upon cable, 4S, during this backward travel of the truck and bucket, the bucket may be caused to right itself because of the turning of the crank arms, 40, caused by the pull of the cable, 48, exerted through bars, Wand arms, 42. Durinfr the backward, rearward travel on the ri ht hand portions of the tracks hook, 51, fallsfliy gravit into place to catch over angle bar, 49, wiereby on the next forward travel the bucket is maintained and securely held in pro er position for shaving 0H a layer of dirt of t e desired. thickness. It will be understood that in this structure as in other similar structures in this art, theraxne, 13, is fed downwardly by steps so that during the reciprocetions of the bucket it successively shaves or scrapes off layers of dirt and removes 'the same from the trench, lthe dirt being dumped on one. of the banks by tho method described above.

Attention is directed to the feet that the bucket is not pivoted or hinged directly to the truck, but rather to the members, 27 these members at their beck ends being hung on axle, 22, so 4thet 'the whole bucket may be swung unwerdly around this axle as a center during t c rearward trevel of the surfrepormitting the bucket to ride over any inequalities or obstructions. stacle is passed, however, the bucket and ..1nembers, 27, drop to their original positions with the flanges, 29 resting on the top flanges 'of channels, 19. To those skilled in the crt it will be apiperent that numerous minor mechanicalA chenges may, be mede in the construction shown and described without departing from the heart of my invention or sacrificing any of its advantages or benefits. l I claim: j y 1. In an excavator, the combination of a truck bucket rotatabl. vmounted on said truck, an arm pivotaly connected to seid bucket, endmeans connected to fsaid arm whereby the bucket rnc be pulled along, substitutie-ily as describeci "In en excavator, the combination of e rotatably mounted bucket, en arm pivotally connected to seid bucket, a stop cooperating with seid erin to limit its travel, end means connected to said erm whereby the bucket may be pulled along, substantially as described, Y

3. In an excai'ator, the combination of a rotatably mounted bucket,- anarm pivoted thereto, a roller mounted on said arm, a track upon which saidroller travels, a stop to limit the travel of said roller, and means connected to said :arm whereby the, bucketl may be pulled along, substantially as described.

4. In an excavator, the combination of a truck, a bucket rotatably mounted on said truck, a crank arm adapted to turn with said bucket, an arm pivotally connected to saidv crank arm and a cable fastened to said arm, whereby -the bucket may be pulled along,v

substantially as described.

5. In an excavator, the combination of ay truck, a bucket, a bail pvotall 'connected at its opposite ends to said ucket, and means fastened to said bail whereby the bucket may be pulled along, substantially as described.

A6. In an excavator, `the combination of a rotatably mounted bucket, a bail pivotally connected at its ends to-said bucket, a stop coperating with said bail, and means fastened to said bail whereby the bucket may be pulled along, substantially as described.

7. In an excavator, the combinati?) of a track, a truck, 'one or more wheels vf said truck adapted to travel on saidl track, a bucket rotatably mounted on said truck, an arm pivotally connected toy said bucket, a

A roller on said arm adapted to travel on said track, and means fastened to said arm Whereby the bucket may be pulled along, substantially as described. i l

8. lIn an excavator, the combination of a track shaped to conform substantially to the cross-sectional profile of the proposed trench,

a truck, one or'more wheels onsaid truck 40 travelin von said track, a bucket rotatably mounte connected to said bucket, a roller on said arm adapted to travelon said track, astop cooperating With'said roller to limit its travel, and means fastened to said arm whereby the bucket may be pulled along, substan- 7 tially as described.

9. In an excavator, the combination of a pivoted bucket, an arm pivotally connected to saidbuket, .means fastened to said arm whereby the bucket may bel pulled along,

and meansto prevent said bucket from turn-v ing to discharge its contents during a ortion ofits travel, substantially as descri ed.

10. In an excavator, the combination of a truck, a bucket rotatably mounted on said truck, a bail pivotally connected to said bucket, a cable fastened to said bail andl affording means for ullingsaid bucket alon anda hook on sai truck cooperating wit said bucket to prevent turning of the latter CHARLES C. JACOBS.

Witnesses: y

FREDERICK C. GOODWIN, WALTER M. FULLER. 

